XR219, Capital idea - why not have a control centre at, oh I don't know, Northolt?
Double Zero,
Google Flettner 282, Flettner 265 and Drache. The Germans had a number of operational helicopter types in WW2 and conducted trials between Flettners and Me109s/FW190s to assess vulnerability. Which they discovered was surprisingly low when the RW were well flown at low level. The operational use of the Drache over the Eastern front was also surprisingly successful.